Algebric loop in simulink

2012 11 9
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How to make algebric loop in simulink,
I have requirment where I have to add two constant numbers with increment of 1, a=constant b=constant
a1=a+b; a2=a1+b; a3=a2+b; a4=a3+b;

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Azzi Abdelmalek
Azzi Abdelmalek 2012-11-9

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use this model

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Arun Badigannavar
Arun Badigannavar 2012-11-15
Ya I tried this model but I want to set the time,here in this model the time is taken based on solver? I want to calculate it for continuous ,and it should stop when I stop manually,,how to calculate this for continuos updation of 'a' value
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-15
What do you mean I want to set a time?
Arun Badigannavar
Arun Badigannavar 2012-11-15
How can I put infinite loop in simulink
Azzi Abdelmalek
Azzi Abdelmalek 2012-11-15
just set stop time to inf (simulation parameter)

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You can use 'from' and 'goto' blocks from simulink-->signal routing library.

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Arun Badigannavar
Arun Badigannavar 2012-11-9
But how to update a1 to a2 to a3,I am trying for loop ,,but not getting how to work with for loop subsystem
a1=a+b( for a1(tag name) use goto block to store the value(either 'local' or global), then do continuously..
Arun Badigannavar
Arun Badigannavar 2012-11-9
This doing continuosly am not getting,how to continue it with increment of a1 a2 a3 a4

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Anthony Poulin
Anthony Poulin 2012-11-9

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Hey, in your case you don't have an algebrical loop because your operations are in ''cascade'' (english translation of a french word, I don't know if it's understandable). If you want to create one, you have to make an operation like a1 = a + a1.

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